Attachment for metal-working machines.



P. MULLER. ATTACHMENT FOR METAL WORKING MACHINES. APPLICATION FILED NOV. 26, 1915- Patented Sept. 4, 1917.

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, P. MIJLLER. ATTACHMENT FOR METAL WORKING MACHINES. APPLICATION FILED NOV- 26.19I5- msww. Patented Sept. 4, 1917.

. 2 SHEETSSHEET 2.

I X W W I ft; 1T s ra' raiar PAUL Mfume, or BERLIN, GERMANY.

ATTACHMENT Fee METAL-WORKING MACHINES.

lessees.

plurality of toolswhich are successively brought into operative position as required by the particular work to be performed. A

imai'n feature the invention resides that the connection of the driving spindle with the successive tools is automatically efliected Within "the said device. I

My invention consists essentially of arotatable turret-heac'l having a plurality of vertical bores for the insertion of the tools, and adapted to successivelyfbring said tools in line with the driving"spindle for the purpose o-i""operat-i\ ely connecting the latter With the respective tool. i l

My invention "further consists in certain means devisedforholding the tool in the head ready for connection withthe' dri'vinig spindle and insuring positive connection While at the same-time allovving thetool to move together with the driving spindle in the head as required either'for engaging the Work or for Withdrawal therefrom.

My inventioiris shown in the accompanying draWings wherein Figure lis'a'n elevation of the head with a single-toolthei' ein, and of the part of the machine to which the head is rotatively attached, i

Fig. 2 is an end view ofthe turret-head for the insertion of three tools and Fig.3 is a sectional view of the turrethead on alai'ger scale with a tool therein and the driving spindle;disengaged therefrom.

a designates a tool having an annular flange Z) to exactly fit, and guide the tool in, the holding means 0 provided in the head (Z. The holding means comprises two hollow cylinders c and 0 the one telescopically fitted Within the other and secured thereto by means of a threaded ring 0 and farther a catching and a centering device, both devices being attached to the inner cylinder 0 Specification of Letters Patent.

Patentedfiept. t, 1917.

" Application filed November 26, 1915. Serial No. 63,428.

The head (Z is-inounted to allow of rotation about the central pivot (Z rigidly connected with a stationary part c of the machine and is provided with a number of, preferably three, symmetrically located bores n. Fig. 52. for the insertion of three tools. The flange Z2 isalso a means for retaining the tool a Within the holding means "0, so that the tool upon being inserted, as shown in Fig. 3, is

caught and cannot drop from the holder. l -o this end a catch f is movably suspended on a pin efin a recess 8 of the Wall of the i inner"cylinc lerc and has a lateralprojection or'nose 'q forming a stop or abutment.

back of said nose 9 a spring u is profvided in sa d recess 8 to keep the catch 7' in .ltS normal positlon, that is to say, with the nose 9 in. the path'of the tool as shown in Fig. 3. The lower end of the catch is forked the recess s andipartly 'a recess t'of the outer bylindeir c and to transverselyproject into the path of the tool. This plate i is carried hiya ring it yieldingly supported by a spring 9.

In Fig. 3, a 'single catch 7" and a single plat-e only are Sl1OW11,bUt in fact a plurality thereof, preferably three, are provided in the cylinder 0.

. To keep the tool ready for operative connection with the driving spindle in exactly axial position: a plurality of centering arms, preferably three, are provided;

Each arm m'is movably mounted on a pin m and -a spring m is provided to hold the arm straight or horizontal position, as 1 shown in Fig.3, sothat the free ends of the -.-arms are in'contact with the shank a? of the tool; The two cylinders c and c forming a single rigid pieceare mounted onball bearings n Within the head cl. showing three holes located symmetrically,

The operation is'as follows: Theholl'ow driving spindle 0, Fig. 3, is

lowered to cover the shank a of the tool a and in going down the SPlDCllGtlllfIlS each arm at Eto :a vertical position, causing it to lie within the recess p of the inner cylinder 0 On the further advance of the spindle '0 tl16l2ttt6l is'lockedlto the shank a of the ,tool.-, To thisend the said shank may be at Iso as to engage a pin is of a'sinall plate i mounted to occupy partly the lower part of catch f and forces the catch and the plate 2' out of the way, said catch and plate moving: back against the resistance of the spring u and becoming embedded in the recesses s and t provided in the cylinders '0 c respectively. Thus the tool a is released and can be further moved out of the head (6 by the descending spindle 0, to assume the pos1- tion, shown in Fig. 1.

During the drilling operation the spindle o is in contact and rotates with the holding cylinders c and 0 and their appurtenances. When the work is finished the spindle o is Withdrawn from the-head to reassume the position shown in Fig.3, the flange Z) ofthe tool a engaging the nose 9, as shownin Fig. 3, sothat the spindle 0 canbe Withdrawn from the tool shank a What I claim is: j 1

1. In a drilling, boring or similar metal Workingmachine, the combination with the driving spindle, of a rotatable head having bores adapted to receive each a tool and also the said driving spindle, permitting'the same to be operatively connected to the said tool, and a holding means Within each-bore, comprising a rotatable cylinder, catches pivoted in recesses of the said cylinder and having projections and each a forked end, springs for holding said catches in operative position, and yieldingly mounted plates, located in recesses of said cylinder and having. eacha pin in engagement with the forked ends of the said catches, both the catches and the said plates being arranged to hold the tool in position ready for the said driving spindle to beconnected thereto. 3. In a drilling, boring or similar metal -.working machine, thecombination with the driving spindle, of a rotatable head havingv bores adapted to receive each a tool and also the said driving spindle, permitting the same to be operatively connected to the saidtool,

and a holding means Within each bore com prising a rotatable cylinder, catches pivoted in recesses of said cylinder and having each a projection and a forked end, springs for holding said catches in operative position, a helicalspring, airing on top of said helical spring, plates supported by said ring, and pinsin the said plates adapted to be engaged by the forked ends of the said catches,

both the latter and the said plates being ar ranged to hold the tool in position ready for the said driving spindle, to be connec ed thereto. j

- 4. In a drilling, boring or similar metal working machine, the combination with the drivingspindle, of a rotatable head having -boresa'dapted toreceive' eacha tool and also.

the said driving spindle permitting; the same to be operatively connected to the said tool, and a holding means :within each bore forholding thetool ready forthe said driving spindle to be connected thereto, and centering arms for supporting the tool in centered position. i i p .5. In a drilling, Working machine,.the combination with the driving spindle, of a rotatablehead having, bores adapted to receive each a tool and also the said driving spindle, permitting the same to beoperatively connected to the said tool, anda holding means Within each bore, co nboring or similar metal 1 prising a rotatable cylinder, catches. provided in recesses of said cylinder and having projections adapted to engage the said .tool springs for holding said catches in. operative position, a yieldingly supported plate arranged tocooperate with saidvcatches, and

. centering means to support the tool in centered position. j p j p .6 In a drilling, boring orsimilar metal working machine, th e combination with the driving spindle, of a rotatable head having bores adapted to receive each a tool and also the said driving spindle, permitting the same to beoperatively connected to the said tool, and a means for holding. the tool within each bore, comprising a rotatable cylinder,

composed oftwo telescoping, cylinders capable of relative adj ustment,a threaded ring locking the two cylinders together, ball bearingsbetween the inner wall of the said rotatable head and the said cylinders, catches provided in the wall of the inner cylinder and adapted to engage a projection on the tool, and centering means for centering and guiding-the tool in the bore.

In testimony whereof I have afi'ixedmy signature in presence of two witnesses.

. PAUL Mi'fiLL-en.

Witnesses: i i BERN ARDGRKTZ,

' WIILH ANDRAE.

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